By Henrietta Cook

Conservative micro-parties have put senior government minister Mary Wooldridge near the bottom of their preference flows in the upper house because of her pro-choice stance on abortion.

Ms Wooldridge is the only Liberal MP to express a view on abortion in a survey ahead of the state election.

Despite being number one on the Liberal Party's list for the Eastern Metropolitan region, a handful of anti-abortion parties including Rise Up Australia, the Democratic Labour Party and Australian Christians have put Ms Wooldridge well below other Liberal candidates.

The three hard-right parties signed an agreement in August to help each other in the upper house, vowing to support candidates with shared values, including being opposed to abortion.

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Australian Christians' eastern metropolitan candidate Vickie Janson, who is also the party's state director, said the parties discussed ways of influencing a "more pro-life vote".

"She doesn't support more humane laws and our laws are quite barbaric, most people don't realise that we have full term abortions."

The Democratic Labour Party, who have vowed to introduce a bill to wind back the state's abortion laws if they win a seat, put Ms Wooldridge number 30th on their list of preference flows, compared to ninth for Liberal MP Richard Dalla-Riva.

Family First also put Richard Dalla-Riva, who voted against decriminalising abortion, ahead of Ms Wooldridge.

However, Ms Wooldridge and Liberal MP Bruce Atkinson are set to be elected in the region on first preferences without needing any preference flows from micro-parties.

Fair Agenda, an organisation that focuses on fairness and equality for women, is asking lower house candidates to state their views on abortion in a survey ahead of the state election.

"It's disappointing that candidates aren't being upfront about where they stand," the group's executive director Renee Carr said.

"We know 85 per cent of voters support the legal right to choose, and that this issue would affect the voting intention of 48 per cent of voters. These people deserve to be able to make an informed vote."

She said Ms Wooldridge was the only Liberal MP to respond to the online survey, with the MP stating that she supported the current abortion laws.

Abortion flared as an election issue on Monday when Nationals candidate for Buninyong, Sonia Smith, threatened to not preference the Liberal candidate, Ben Taylor, for the seat because of his views on abortion.

Mr Taylor told an Australian Christian Lobby candidates event that he was opposed to abortions after 20 weeks and Victoria's laws had "gone a little bit too far".

"It's pretty horrific what can happen and when you start talking about nearly to birth where you're looking at abortion and termination, it's pretty frightening."

Premier Denis Napthine said he hadn't spoken to Mr Taylor about his views on abortion and wasn't planning to before the election.

Mr Taylor did not take questions from reporters in Ballarat on Tuesday, evading television cameras and journalists as he drove off in his campaign car.

However Ms Smith's threats to not preference Mr Taylor over his views appear to have come too late for pre-poll.

Volunteers handed out Nationals how-to-vote cards in Ballarat on Tuesday which listed the Liberals second.